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The 1971–72 FIBA European Cup Winners' Cup was the sixth edition of FIBA's 2nd-tier level European-wide professional club basketball competition, contested between national domestic cup champions, running from 4 November 1971, to 21 March 1972. It was contested by 21 teams, five less than in the previous edition, and it marked a reform in the competition's format; a 6-team group stage was introduced, replacing the quarterfinals.